| 摘要 |
A battery charger (10) recharges reusable batteries (B1, B2,... BN) in a manner that prevents overcharging of the same. The charger includes a voltage source and non-dissipative shunt arrangement that can be customized to charge any number of batteries. The charger (10) may be a current limiting power supply that is controlled by the voltage or charge state of the batteries being recharged. The non-dissipative shunt includes a pair of transistors (Q1, Q2; Q3, Q4;... Q2N-3, Q2N-2) for each pair of batteries and an inductor (L1, L2,... LN-1) placed one end between the battery pair and another end between the transistor pair. An oscillator (14, 204), having two phases ( phi 1, phi 2) of equal, but opposite phase, is used to control each transistor to apply charge to a given battery during one phase and then to allow the charge to equalize between the battery pair during the second phase. The equalization is continued until both batteries reach a full charge without overcharging any one battery. |
